盐胁迫条件下钙对小麦根细胞膜电位和钾离子吸收的影响

Calcium Modulate Plasma Membrane Potential and Absorbing K^+ in Responsive to Salt Stress in the Cell of Wheat Roots

小麦根细胞质膜电位变化可调控质膜钾离子通道的开闭 ;用 10 0mmol L的NaCl处理可以引起小麦根毛细胞膜电位降低 (去极化 ) ,并伴随有根细胞的钾离子含量降低 ,质膜的MDA含量和细胞渗漏增加 ;10mmol L的CaCl2可以稳定根细胞膜电位 ,抑制NaCl引起的细胞膜电位的降低 ,促进根对钾离子的积累 ,减少细胞质膜渗漏和降低MDA的含量 ,从而缓解NaCl胁迫伤害 。

This research showed that CaCl 2 enhance the wheat salt tolerances and that the plasma membrane potential change modulated the K + channel opening or closing in wheat root cell; 100 mmol/L NaCl reduced the membrane potential, in conjunction with K + content reducing, MDA content as well as the leakage rate increasing; CaCl 2 reversed the NaCl effects, namely that CaCl 2 kept membrane potential, the K + channel opening, and K + content increasing.